Process for reducing the sulfur content of coal and coal char and the ignition temperature of coal char
US4188191A · kind A · utility
6Cited by
1References
1Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 7, 1975 |
| Grant date | Feb 12, 1980 |
| Priority date | — |
| Expiry date | Nov 7, 1995 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10L9/02
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
This invention covers a process for reducing the sulfur content of coal and coal char and the ignition temperature of coal char. Coal is converted into char at temperatures not in excess of about 1600.degree. F. The char is introduced into a caustic system which is maintained at a temperature between about 500.degree. F. to about 750.degree. F. Intimate contact is maintained between the caustic and the char for a period of about 2 to 30 minutes to leach the sulfur from the char. The desulfurized char is thereafter separated from the caustic and washed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.